Coffee machine



FIG. 1 is a front view of a first embodiment of my new design relating to a coffee machine;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a rear plan view thereof;

FIG. 7 is a front view of a second embodiment of my new design relating to a coffee machine;

FIG. 8 is a top plan view thereof;

FIG. 9 is a right side view thereof;

FIG. 10 is a left side view thereof;

FIG. 11 is a bottom plan view thereof; and,

FIG. 12 is a rear plan view thereof. 

The ornamental design for a coffee machine, as shown and described. 